SPRING BARLEY WEED INFESTATION IN VARIOUS CROP ROTATION CYCLES

The goal of the thesis is to evaluate weed infestation of spring barley at various crop rotation cycles, in year 2010 and 2011. The trial site is located at Mendel University trial station Zabcice. The first trial plot represents cropping cycle based on cycle with seven crops (Medicago sativa - first year, Medicago sativa - second year, winter wheat, silage corn, winter wheat, sugar beet, spring barley, The second trial plot represents cropping cycle based on five crops (corn, spring barley, Carthamus tinctorius, winter wheat, winter wheat). The 39 weed varieties have been found at the trial plots. The results shows, the higher is cereals density in cropping cycles, the higher is the weed infestation of Galium aparine.